ML20151D270
| ML20151D270 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 03/12/1988 |
| From: | Advisory Committee on Reactor Safeguards |
| To: | Advisory Committee on Reactor Safeguards |
| References | |
| ACRS-2553, NUDOCS 8804140090 | |
| Download: ML20151D270 (10) | |
Text
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068-M53
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CERTIFIED COPY DATE ISSUED: March 12,1988
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MINUTES FOR THE FEBRUARY 2-3, 1988 MEETING OF THE ACRS SUBCOMMITTEE ON TVA ORGANIZATIONAL ISSUES The ACRS Subcnmittee on TVA Organizational Issues met on February 2-3, 1988. The Subconnittee met at TVA Headquarters in Chatanooga, Tennessee on February 2 and visited the Sequoyah site on February 3.
The purpose of this meeting was to continue the Subcomittee's review of TVA's management reorganization and the issues related to the restart of Sequoyah Unit 2.
The Subcorraittee discussions on February 2 began at 8:30 a.m. and were adjourned at about 6:00 p.m.
The site visit on February 3 was began at about 9:00 a.m. and was adjourned at about 1:00 p.m..
All of the discussions were held in open session and a transcript was kept of the February 2 discussions.
Selected meeting handouts are included with these meeting minutes. All of the meeting handouts are attached to the meeting transcript.
l The principle attendees at this meeting were:
QS NRC Staff C. Wylie, Subcomnittee Chairman G. Zech, OSP J. Ebersole, Member E. McKenna, OSP C. Michelson, Member K. Barr, OSP D. Ward, Member R. Savio, ACRS Staff TVA P. Barton, ACRS Consultant C. Fox T. Jenkins H. Hagedorn, ACRS Consultant D. Wilson W. Lloyd i
J. Kirkebo W. Hannum W. Lau S. Smith X. Brown j
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Minutes /TVA Organizational 2
Issues-Feb. 2-3, 1988 Highlights 1.
Mr. Wylie summarized the purpose of the February 2-3 discussions.
He noted that the ACRS had last reported on TVA issues on August IP. 1986 and had subsequently discussed these issues in July 1987 and in November 1987. Additional ACRS discussions are scheduled during February 11-13, 1988 ACRS meeting. Mr. Wylie stated that he believed that it would be appropriate for ACRS to report to the Corrission during the February 11-13 ACRS meeting.
2.
Mr. Gary Zech (NRC-OSP) reported on the status of the NRC review of TVA's reorganization and the Sequoyah restart. He noted that personnel changes had been made in the NRC Office of Special Projects (OSP) as the result of Mr. Keppler's leaving the NRC.
The current OSP organization chart and management pertonnel assignments are included as page 1 of Attachment A.
The NRC Staff.ios issued their SER on TVA's Corporate Plan in July 1987. This document was 4
reviewed by the ACRS during their November 1987 discussions. The NRC Staff has also issued their firal report on the Intergrated Design Inspection (November 6, 1987) and their SER on the Sequoyah restart (January 21,1908) and have provided copies to the ACRS.
The NRC Staff believes that significant improvements have been made in TVA's organization and plant operations and believes that restart of Sequoyah *Jnit 2 is possible in late February /early March.
The status of the principle review issues is summarized on page 2 of Attachment A.
The matter will be brought before the i
t Minutes /TVA Organizational 3
Issues-Feb. 2-3, 1988 Commission for approval prior to restart.
(A Commission discussion is scheduled for February 24,1988) The NRC Staff expects to closely monitor the Sequoyah non-nuclear heatup and subsequent operation.
The current schedule fnr the restart of the remainder of TVA's reactors is given on page 3 of Attachment A.
3.
Ms. Eileen McKenna (NRC-0SP) discussed the NRC Staff work on the Integrated Design Inspection (IDI) of the Essential Raw Coolant Water System (ERCWS) for Sequoyah Unit 2.
The inspection was conducted between July 8 and September 11, 1987 and the NRC Staff's.
final report was issued on November 6, 1987.
Followup inspections were conducted on November 2-19, 1987 and February 1-5, 1988.
The Staff identified systems integration, the design verification process, the timeliness of corrective actions, and the timeliness of procedure revisions as problem areas. Selected aspects of structural design are being reviewed on a plant-wide basis. The modifications which have been made to the ERCWS as a result of the IDI are listed on page 4 of Attachment A.
Other plant systems were examined for the existance of the weakness discovered in the IDI.
It was noted that TVA had used refined engineering analysis as a l
substitute for design margin.
It is the NRC Staff's belief that the IDI process provides assurance that TVA's corrective-actions programs have been effective. Mr. Douglas Wilson (TVA) discussed the lessons-learned from the IDI. Sumaries of the deficiencies found in the IDI are given on page 5 of Attachment A.
1
Minutes /TVA Organizational 4
Issues-Febo 2-3, 1988 4
TVA use of vented terminal block enclosures was discussed. TVA has replaced termal block connections for "low-current" conductors (i.e., sensors, etc.) with sealed splices.
Higher current conductor applications are not compromised by the potential for low current leakage in a moist environment.
5.
TVA has perfortred an extensive review of the engineering calcu-lations for Sequoyah Unit 2.
Approximately 12,000 were reviewed.
A summary is given on page 6 of Attachment A.
For calculations not involving pipe supports, approximately 70% of these calculations were complete and correct, approximately 4% were revised, and approximately 26% were regenerated.
Less than 1% of the re-viewed / revised resulted in a hardware modification. All of the calculations involved support for Category 1 pipe were regenerated and about 11% of these lead to hardware modifications.
(VA has also performed a design baseline and verification progran.
The lessons learned from this have led to significant chances in the design and modification control process and organization.
6.
TVA has replaced all of the AIW silicone rubber cables in Sequoyah Unit 2.
The AIW cable appeared to be susceptible to handling and installation damage.
Other manufactures brand silicone rubber cable was replaced only if it was in the same conduct as the A1W cable.
Environmental qualification tests performed at Wyle Laboratories appear to show that the cables will perform adequately at system design voltages with very thin (4 to 6 mil) thickness of installation.
Minutes /TVA Organizational 5
Issues-Feb. 2-3, 1988 7.
There was discussion as to the mechanisms used to document the resolution of the various technical issues. Mr. Michelson stated that he believed that the NRC Staff needed to consolidate the results of their review in a few summary documents. There were also some discussion as to how systems engineering was incorporated into the design and modification process.
Engineers in design engineering and at the plant site have been given responsibility for particular systems and subsystems and have the responsibility.
Mr. Ward and Mr. Hagedorn stated that it was the belief that their NRC Staff should be made more use of management specialists. Mr.
Barton noted that a number of new managers have been added to the TVA Staff and that attention should be paid to giving these individuals plant-specific technical training.
8.
The Sequoyah site was visited on February 3.
Areas toured were the site coordination center ("war-room"), the diesel generator build-ing, the ERCW pump house, the cable spreading room, and the control room.
NOTE:
Additional meeting details can be obtained from a transcript of this meeting available in the NRC Public Document Room, 1717 H St., NW., Washington, D.C. or can be purchased from Heritage Reporting Corporation, 1220 L Street, NW.,
Washington, D.C. 20005, (202) 628-4888.
EXECUTIVE DIRECTOR FOR OPERAT!CNS VICTOR STELLO, JR.
JANES M. TAYLOR DEPUTY DIP.ECTOR OFFICE OF SPECIAL PROJECTS STEWART D. EBNETER /
TECHNICAL, PROGRAM, AND DIRECTOR SECRETARIAL SUPPORT STAFF JANE A. AXELRAD BARRY ZALCMAN, TECH. ASST.
DEPUTY DIRECTOR DEBRA J. CORLEY, PGM. ASST.
M. LYNNE SAPP, PGM. ASST.
BARBARA A. TOMPKINS, SECY.
MARY ELLEN SIMMS, SECY.
TVA PROJECTS DIVISION COMANCHE PEAK PROJ. DIV.
STEVEN D. RICHARDSON-CHRISTOPHER I. GRIMES ACTING DIRECTOR DIREC7)R PHILLIP F. McKEE DEPUTY D: RECTOR ASSISTANT DIRECTOR ASSISTANT DIRECTOR FOR FOR PROJECTS PROJECTS GARY G. ZECH -
JAMES H. WILSON ASSISTANT DIRECTOR ASSISTANT DIRECTOR FOR FOR TECHNICAL PROGkAMS TECHNICAL PROGR445 S.D. LIAW JAMES E. LYONS ASSISTAhi DIRECTOR ASSISTANT DIRECTOR FOR FOR INSPECTION PROGRAMS INSPECTION PROGRAMS KENNETH E. BARR' ROBERT F. WARNICX (Acting) l
cd STATUS OF KEY tSSUES REGARDING SEQUOYAH, UNIT 2 catecorv Issue A
B1 B2 C
Corporate Plan x
Sequoyah Site Management x
Quality Assurance X
Integrated Design inspection X
Design Baseline verification Program X
Design Calculations Review CiviI X
Electrical X
Alternately Analyzed P; ping / Supports X
Heat Code Traceability X
Cal.le Installation X
i j Fuse Replacements X
Ampacity X
Fire Protection X
Environmental Qualification X
Welding X
Technical Specifications X
Hydrogen Analyzer Operability X
Procurement Concerns X
Maintenance X
Exemptions X
Post Modification Testing X
l Restart Test Program X
Surveillance instructions x
Detailed Control Room Design Review x
Operational Readiness X
J Employee Concerns X
j Allegations X
NRC and TVA are in agreement regarding how tne Category A issue is being handled and NRC's review schedule is consistent with the licensee's sch,edule for resolution of the itsue.
Category 8 - Issue has potential to impact restart schedule.
Category 81 - NRC and TVA are in agreement regarding how the issue is being handled and potential slippage of restart could exist based on licensee activity.
NRC and TVA are in agreement regarding how Category 82 the issue is being handled and potential slippage of restart could exist based on NRC staff activity, Category C - Questions still exist regarding how the issue will be resolved.
i
b TVA RECOVERY SCHEDULE 1
(TVA PROJECTIONS)
ESTIMATED RESTARI l
PLANT DATE SEQUOYAH UNIT 2 IEBRUARY 23, 1988 SEQUOYAH UNIT 1 SIX MONIHS AFTER SQN 2 BROWNS FERRY UNIT 2 FALL 1988 BROWNS - tiRRY UNI T I SUMMER 1989 i
SROWNS FERRY UNIT 3 SUMMER 1990 i
WATTS BAR UNIT 1 FALL 1990 WATTS BAR UNIT 2 1991 BELLLIONIE UNil5 1 AND 2 EARLY TO MID 1990*S i
g l
k PHYSICAL MODIFICATIONS o CAST IRON HEADS ON CHARGING PUMP GEAR OlL COOLER o REllEF VALVES ON AUXILLARY CONTROL AIR COMPRESSOR COOLERS
., w g$e o REIJEF VALVES ON STATION AIR COMPRESSOR C0OLERS
^^
7
, y,, ~ ~ y o AUTOMATIC ISOLATION OF NON-SEISMIC ERCW PIPING
(
o REPIACE 3 KER0 TEST VALVES (POST-RESTART)
INSTALL M]SSING PlPE CLAMP (FLEX HOSE CONNECTION) o o ERCW SPOOL PIECES o PIPE SUPPORTS l
o REPIACE FLEXIBLE HOSES o RBR AND CS HEAT EXCBANGER ANCHORAGE MODIFICATION 0 TRAVEllNG SCREEN SPEED SICTCH FUSE C0 ORDINATION o SPACERS BETWEEN CABLES IN MAIN CONTROL BOARDS o INSTALL IS01ATING FUSES IN TRAVELING SCREEN CIRCUIT
l TVA CATEGORIZATION OF NRC FINDINGS MECH.
MECH.
COMP.
CIVIL 1&C ELEC. TOTAL i
e DEFICIENCIES
- ENG.
4 9
1 4
0 18
- MINOR CALC ERROR 2
2 4
0 0
8
- OPERATIONS 2
0 0
1 0
3 NO DEFICIENCY 1
6 4
7 2
20 DOCUMENTATION 1
7 10 3
3 32 e
OBSERVATIONS 0
0 0
2 3
5 TOTAL 18 24 19 17 8
86 1
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